Requires.cs

Go to the documentation of this file.

using System.Diagnostics;
using System.Runtime.CompilerServices;
 
namespace System.Collections.Immutable;
 
internal static class Requires
{
    [DebuggerStepThrough]
    public static void NotNull<T>([ValidatedNotNull] T value, string? parameterName) where T : class
    {
        if (value == null)
        {
            FailArgumentNullException(parameterName);
        }
    }
 
    [DebuggerStepThrough]
    public static T NotNullPassthrough<T>([ValidatedNotNull] T value, string? parameterName) where T : class
    {
        NotNull(value, parameterName);
        return value;
    }
 
    [DebuggerStepThrough]
    public static void NotNullAllowStructs<T>([ValidatedNotNull] T value, string? parameterName)
    {
        if (value == null)
        {
            FailArgumentNullException(parameterName);
        }
    }
 
    [DebuggerStepThrough]
    private static void FailArgumentNullException(string parameterName)
    {
        throw new ArgumentNullException(parameterName);
    }
 
    [DebuggerStepThrough]
    public static void Range(bool condition, string? parameterName, string? message = null)
    {
        if (!condition)
        {
            FailRange(parameterName, message);
        }
    }
 
    [DebuggerStepThrough]
    public static void FailRange(string? parameterName, string? message = null)
    {
        if (string.IsNullOrEmpty(message))
        {
            throw new ArgumentOutOfRangeException(parameterName);
        }
        throw new ArgumentOutOfRangeException(parameterName, message);
    }
 
    [DebuggerStepThrough]
    public static void Argument(bool condition, string? parameterName, string? message)
    {
        if (!condition)
        {
            throw new ArgumentException(message, parameterName);
        }
    }
 
    [DebuggerStepThrough]
    public static void Argument(bool condition)
    {
        if (!condition)
        {
            throw new ArgumentException();
        }
    }
 
    [MethodImpl(MethodImplOptions.NoInlining)]
    [DebuggerStepThrough]
    public static void FailObjectDisposed<TDisposed>(TDisposed disposed)
    {
        throw new ObjectDisposedException(disposed.GetType().FullName);
    }
}